Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings Per Share

	2015				2014			2013
	Basic			Diluted	Basic		Diluted	Basic		Diluted
Amounts Attributed to Phillips 66 Common Stockholders (millions):
Income from continuing operations attributable to Phillips 66	$	4,227		4,227	4,056		4,056	3,665		3,665
Income allocated to participating securities	(6		)	—	(7	)	—	(5	)	—
Income from continuing operations available to common stockholders	4,221			4,227	4,049		4,056	3,660		3,665
Discontinued operations	—			—	706		706	61		61
Net income available to common stockholders	$	4,221		4,227	4,755		4,762	3,721		3,726
Weighted-average common shares outstanding (thousands):	537,602			542,355	561,859		565,902	608,983		612,918
Effect of stock-based compensation	4,753			4,622	4,043		5,602	3,935		6,071
Weighted-average common shares outstanding—EPS	542,355			546,977	565,902		571,504	612,918		618,989
Earnings Per Share of Common Stock (dollars):
Income from continuing operations attributable to Phillips 66	$	7.78		7.73	7.15		7.10	5.97		5.92
Discontinued operations	—			—	1.25		1.23	0.10		0.10
Earnings Per Share	$	7.78		7.73	8.40		8.33	6.07		6.02